Agitator for food mixers



June 13, 1939.

J.'B.KEssEl.

AGITATOR FOR FOOD MIXERS Filed Feb.' 8, 1957 Patented June 13, 1939 UNITED STATES PATENT OFFICE.

2,161,861 'Aarra'ron' ron roon amas Johannes B. Kessel, Chicago, 11i., assignor to Chicago Flexible Shaft Company, Chicago, lll., a corporation of Illinois appunti neuw-y s', 1937, serai No. 124.561

4 cam. (ci. zam-1:41) I v This invention relates in general to food Ymix'- ers, but more specifically it relates to improve-V ments in agitators, particularly adapted, though not necessarily limited in its use in s uh appa- 5 ratus, and one of the objects of the invention is to provide an improved form of agitator or beater which will be of a sturdy construction, cheap to manufacture, and effective and emcient in operation, and in which the parts will not becomel0 oose, but will remain securely fastened in p05!- ion. f To the attainment of these ends and the alccomplishnient of other new and useful objects as will appear, the invention consists in the fea- 15 tures of novelty in substantially the construction,

combination and arrangement. 'of vthe several parts, hereinafter .more fully described and claimed and shown in the accompanying drawing L illustrating this invention, and in which Figure 1 is a view partly-in elevation, partly in section and partly broken away of a plurality of agitators constructed in accordance with the principles of this invention, and showing the same in connectionl with a portion of an actuating 5 mechanism;

Figure 2 is a detail sectional view taken on line 2 2, Figure 1.

Figure 3 is adetail perspective view'of a porftion of an agitator shaft with portions of the m agitator shown in assembled relation, on an enlarged scale, and with the parts separated.

Y Figure-i is' a detail sectional view taken online 4-/4 Figure 2, on an enlarged scale.

The agitator Aconsists essentially of a pair of ,5 ilat flexible stripsil, constructed of any suitable material, arranged to cross each other intermediate. the ends thereof and are preferably at substantially right angles to each other.

These strips arer secured together preferably L0 by means of an agitator shaft I I, the lower extremity of which is preferably reduced to form n I4 of any desired orsuitable sine andthe wall" 5 of the recess is provided with -oi notches are arranged and suitably -spaced Il that open through the topof the wall and circumferentially of the collar. Y

Mounted also upon the shaft II is another collar I8 which is disposed above the collar I3, 5 and the' collar I6, like the collar I3, closely ts the shaft.

The collar I6 is provided adjacent itsbase with a laterally projecting circumferentialV ange I1, of any desir-e5! width, and this ange I1 may, if o10 desired, be provided with a beveled portion I8, theA 'iiange and the beveled portion being both adapt- 'tion vbut are preferably of a dovetail shape and are of such a width and conguration as to enter the respective recesses i5 in the wall ofthe seat 20 Il of the collar I3 to be held by the edgosofthe notches entering the cut away portions I9,

The strips Il are bent into substantially circu- `lar form and the heads -or extremities 2B are placed within the respective recesses I5, the coi- '25 lar I3 having been mov ed to the proper position to receive such heads.

The collars It and I3 are then brought into closely assembled relation so that the flange" ofthe collar II will be telescoped into or seated 43o within the seat Il to clamp' the extremities or headed ends 2l of the strips Il therebetween. Y This may be accomplished in any suitable manner, that is, the collar or the I6 maybe secured to the-shaft I I against movement length- 354 `moved toward and into assembled relationship with the iixed collar.

After thepaits have been thus ed and l the ange I1 is disposed within,the\ Il with the heads 2l of the strips Il th a portion of the wall of the seat Il is flanged over the flange I1, as shownmore clearly at-ll' in Figure 4, tonrmlysecuretheseparts'in mem- 45- I bled relation. If the beveled portion iton the iiange I1` is provided, the6 portion of the seat IlV that is ii'anged thereover willscontact the b ev. e1easurfaeen.- Any suitable means' may be provided for pre- ,venting the collar's'il and Il from moving longitudinally of the shaft II when the parts are in 'assembled relation, to maintain the strips il in Utheir bowed or v curved positivon, and alsorfor .'5

maintaining the collars against rotation upon the shaft.

A suitable and efficient manner of accomplishing this result is to provide a series of grooves, knurling, or roughening 22 on the shaft, for any suitable distance, which is engaged by the collars, and the collars may be compressed or otherwise contracted or shaped over such portion of the shaft to firmly secure them together.

With this improved construction it will be manifest that the parts will be securely fastened together and a very inexpensive yet .durable structure will be produced.

. The shaft Il may be of any desired length and the upper end thereof is cut away @as at 23 to provide a flattened surface and also i. shoul'der 24, the latter being spaced .for any desired distance from the adjacent extremity of the shaft.

Arranged .the shaft il, preferably ,in proximity to the shoulder 24, is a recess 25 which opens laterally through the periphery of the shaft. Within this recess is arranged a ball or element 26 held against displacement in any suitable well known manner, such as by crimping a portion ofthe shaft over the element. A spring 2l tends normally to urge the element 26 forwardly-so as to project beyond the periphery of the shaft. The numeral 28 designates .a portion of the casing which containsdriving mechanism, such as gears 20, suitably operated, and connectved to each of these gears is a shaft ill which projects into a sleeve 3|' which latter may be rotatable with the gear. The sleeve 3| is of alength to project Yfor a substantial distance beyond the extremity oi` the shaft 30 and the shaft 3l is cut away as at 32 to provide a 'shoulder 33 spaced. a' `"substantial distance from the extremity of theA shaft, the cut away portion 32 also providing a' fiat surface.

The extremity of the shaft ll is inserted intoV 4the sleeve 3l so that the flat surfaces 2l' and 32 ofthe rpective shafts Ii and 30 will contactv while the extremities of each of the shafts will engage the shoulders 24 and 33 of the other shafts, the sleeve 3| being of an internal diameter ,to closelyt about the joint thus formed between the shafts.

In the wall oi the sleeve 3|A is provided a groove or recess 3l adapted to receive'the spring pressed element 26 so that when' the end of the shaft Ii is telescoped into the sleeve to form a jointed t.

connection withgne shaft n, th shaft li wiu be detachably secured in position so that it will-be rotated by and with the shaft SII.

At the same time this spring controlled el'ement 26 serves as a means for providing a detachable connection between these parts;-

While the preferred form of the invention has shari', said strips having free ends and being bent into substantially circular form and 'thereby placed under tension, the free end of each strip being shaped to form a head, a pair of collars mounted directly upon the'shaft, one of the collars having open recesses to receive said heads, the tension of said strips maintaining their respective heads against a lateral face of said recesses, the other collar being disposed in close proximity to the last said-collar to maintain said heads sead, a portion'f one collar being flanged over a portion of the other collar to maintain.

them against separation, and means for maintaining the collars against movement upon said Y shaft.-

v2. An agitator for food mixers, embodyinga `shaft, a metal band anchored intermediate its ends and bowed to create a tension twherein, a collar secured to the shaft and provided `with av seat opening through one end, the wall of said seat having recesses'opening through the endt'hereof, the free ends of'said band being headed, the said headed ends entering and seated in respective recesses, and being drawn vby the tension of said band against the inner face ofthe wall of said seat in' a direction transverse tothe axis of 4the shaft, and a second collar having a portion entering said seat in the other collar to hold the ends of said band seated, a portion of the wall of -said seat being anged over the second said collar to secure the collars against separation.

3. An agitator for food mixers, embodying a shaft, a-metal band anchored intermediate its ends to said shaft and bowed to create a tension therein, the free endsof the band being shaped .to form heads, a collar secured to the shaft, one end of the collar'being h ollow and provided with open recesses in the wall of said hollow portion, the headed ends of said band being seated in said recesses, the walls offthe recesses extending above the portion of the band that is seated therein, and a second collar on the shaft, a portion of the second collar extending into the hollow. por' tion of the other collar and co-operating with the latter to clamp the ends of the bani'il therebetween, portions of the wall of said hollow portion of the first said collar being flanged over a Vportion of .the second said collar to secure'theln together.

4. Anv agitator for foodrnixers, embodying a ends te said shaft and bowed into shape, notches in the lateral edges ofthe band adjacent the free extremities thereof, a collar secured to the shaft and provided with a seat opening through the end thereof and of a depth substantially greater than the thickness of the band, the free ends of the band seated in'said recesses. the side walls ofthe entering said notches, a second.

collar on the shaft, a portion of the second collar entering said seat and ifo-operating `with theother collar to clamp the free Aextremities of the band therebetween, and interlocking means be tween the collars for maintaining them against separation.

JOHANNESB. KESSEL.

shaft, a metal band anchored ,intermediate itsv 

